Download CVT-765 User`s Manual - Vanguard Instruments Company, Inc.

CVT-765
Capacitor Voltage Transformer Ratio Tester
USER’S MANUAL
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: (909) 923-9390
FAX: (909) 923-9391
May 2011
Revision 1
CVT-765 USER’S MANUAL
REV 1
SAFETY SUMMARY
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from procedures described in this User’s Manual may create one or more safety
hazards, damage the CVT-765, damage the test transformer, or cause errors in the test results.
Vanguard Instruments Company, Inc. assumes no liability for unsafe or improper use of the
CVT-765.
SAFETY WARNINGS AND CAUTIONS
The CVT-765 shall be used only by trained operators. All transformers under test shall be offline and fully isolated. Always ground the CVT-765 to a substation ground before connecting
the test cables to a transformer. Do not perform test procedures or service unless another
person is also present who is capable of rendering aid and resuscitation.
DO NOT MODIFY TEST EQUIPMENT
To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any CVT-765 test unit. To ensure that all designed
safety features are maintained, it is highly recommended that repairs be performed only by
Vanguard Instruments Company factory personnel or by an authorized repair service provider.
Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.
WARNING
Do not remove test leads during a test. Failure to heed this warning can result in electrical
shock to personnel and damage to the equipment.
Always check the voltage setting of the unit before plugging in to power. Failure to heed this
warning may damage the device.
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CVT-765 USER’S MANUAL
TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT ....................................................................... 1
1.0 INTRODUCTION .................................................................................................................... 2
1.1 General Description and Features ................................................................................... 2
1.2 Technical Specifications ................................................................................................... 3
1.3 Controls and Indicators .................................................................................................... 4
2.0 PRE-TEST SETUP ................................................................................................................... 6
2.1 Operating Voltages .......................................................................................................... 6
2.2 LCD Screen Contrast Control............................................................................................ 6
3.0 OPERATING PROCEDURES ................................................................................................... 7
3.1 Connection Diagram ........................................................................................................ 7
3.2 Setting the Date and Time ............................................................................................... 8
3.3 Setting the Interface Language ........................................................................................ 9
3.4 Setting the Frequency (50 or 60 Hz) .............................................................................. 10
3.5 Performing Tests ............................................................................................................ 11
3.5.1. Entering Test Record Header Information ............................................................. 11
3.5.2. Performing a Transformer Test .............................................................................. 15
3.6 Working With Test Records ........................................................................................... 20
3.6.1. Viewing the Contents of the Working Memory ..................................................... 20
3.6.2. Saving Test Results to a Test Record ...................................................................... 21
3.6.3. Restoring a Test Record From Flash EEPROM ........................................................ 24
3.6.4. Restoring a Test Record From a USB Flash Drive ................................................... 28
3.6.5. Copying Test Records to a USB Flash Drive ............................................................ 31
3.6.6. Viewing the Test Record Directory......................................................................... 34
3.6.7. Erasing Test Records from the Flash EEPROM ....................................................... 36
3.6.8. Erasing Test Records from a USB Flash Drive ......................................................... 40
LIST OF TABLES
Table 1. CVT-765 Technical Specifications ...................................................................................... 3
Table 2. Functional Descriptions of CVT-765 Controls and Indicators ........................................... 5
LIST OF FIGURES
Figure 1. CVT-765 Controls and Indicators ..................................................................................... 4
Figure 2. Typical CVT-765 Cable Connections ................................................................................. 7
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CONVENT
C
TIONS US
SED IN TH
HIS DOCU
UMENT
This docu
ument uses the followin
ng conventio
ons:
•
A keyy, switch, or knob on thee CVT-765 is indicated ass [KEY], [S
SWITCH], [KNOB]
[
.
•
Menu
u names are
e referenced as “MENU NAME”
N
•
CVT-7
765 LCD scre
een output is shown as:
1.
2.
3.
4.
5.
•
OPTION
OPTION
OPTION
OPTION
OPTION
1
2
3
4
5
When
n instruction
ns are provid
ded, the men
nu item thatt should be selected
s
is outlined
o
with
ha
rectangle as show
wn below (option 3 shou
uld be selectted):
1. OPTION 1
2. OPTION 2
3. OPTION 3
4. OPTION 4
5. OPTION 5
•
Warn
ning message
es are indicaated as:
Waarning messsage
WA
ARNING
•
Impo
ortant notes are indicateed as:
Note details
NOTE
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CVT-765 USER’S MANUAL
1.0
INTRODUCTION
1.1
General Description and Features
The Vanguard CVT-765 is a microprocessor-based, single phase, automatic, transformer turnsratio tester. This portable test unit is specifically designed to measure the turns-ratios of
Capacitor Voltage Transformers (CVT’s).
The CVT-765 determines the transformer turns-ratio using the IEEE C57.12.90 measuring
method. It uses a 7500Vac excitation voltage source to accurately measure the turns-ratio of
Capacitor Voltage Transformers with a rating of up to 765KV. The transformer turns-ratio is
determined by precisely measuring the voltages across the unloaded transformer windings.
The CVT-765 can measure the turns-ratios of Capacitor Voltage Transformers ranging from 75
to 15,000. The measured turns-ratio, winding polarity, and winding phase angle are displayed
on the unit’s LCD screen.
A transformer’s nameplate voltages can also be entered, and the CVT-765 will display the turnsratio percentage error by comparing the test results with the nameplate voltage values. This
convenient feature eliminates any user-calculation errors when testing transformers.
User Interface
The CVT-765 features a back-lit LCD screen (128 x 64 pixels) that is viewable in bright sunlight
and low-light conditions. A rugged 16-key membrane keypad is used to enter test information
and to operate the unit.
Test Record Storage
The CVT-765 can store 128 records of 33 readings internally, and up to 999 test records on an
external USB Flash drive. Test records can be recalled using the included Transformer Analysis
PC Software.
Computer Interface
A Windows® based (XP/Vista/7) Transformer Analysis Software is provided with each unit and
can be used to remotely control the CVT-765 via the RS-232C port. Using this software, the user
can retrieve test records (from the CVT-765’s memory or a USB Flash drive), analyze test
results, and print test results on a desktop printer. Test results are automatically exported to
PDF, EXCEL, and XML formats.
Operating Voltage
The CVT-765 can be operated from 100-120Vac or 220-240Vac. The proper voltage can be set
using the voltage selection switch on the front panel.
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T
Technical
Specificatio
S
ons
Table
e 1. CVT-765
5 Technical Specification
S
s
TYPE
PHYS
SICAL SPECIF
FICATIONS
P
Portable,
autom
matic, CVT, VT, PT turns-ratio
o tester
Dimensions: 19
D
9.5" x 12" x 17"" D (49.5 cm x 30.5 cm x 43.2
2 cm)
W
Weight:
55 lbs. (24.9 Kg)
INPU
UT POWER 100-120
1
Vac orr 220-240 Vac (selectable), 50/60 hz
ME
EASUREMENT
T METHOD ANSI/IEEE
A
C57
7.12.90
RAT
TIO MEASURIN
NG RANGE 75
7 - 15,000 (5 digit
d
resolution))
TUR
RNS-RATIO ACCURACY
PHASE ANGLE
E READING
7 - 5,000: ±0.2
75
25%, 5,001 - 10,000:
1
±0.35%
%, 10,001 - 15,0
000: ±0.5%
0
0-360
degrees, ±0.1 degree accuracy
a
POLARITY In-Phase or Ou
ut-of-Phase indication
TEST
T VOLTAGE
DISPLAY
C
COMPUTER
IN
NTERFACE
PC SOFTWARE
7
7440Vac
@ 50ma
B
Back-lit
LCD (128 x 64 pixels)), viewable in direct
d
sunlight and
a low light levvels
R
RS-232C
W
Windows
XP/Vista/7 Transformer Analysis Software
S
(includ
ded with purchase)
INTERNAL TEST
T RECORD 128
1 test records. Each record
d contains 33 re
eadings.
STORAGE
EX
XTERNAL TEST
T RECORD Up
U to 999 test records
r
on exte
ernal USB Flassh drive.
STORAGE
SAFETY
ENVIIRONMENT
HUMID
DITY (MAX)
Designed to me
D
eet IEC 61010A
A-1 and CAN/C
CSA C22.2 No.. 1010.1-92
S
Standards
Operating: -10˚ to 50˚ C (15˚ to
O
t +122˚ F);
S
Storage:
-30˚ C to 70˚ C (-22˚ to +158˚ F)
9
90%
RH @ 40˚ C (104˚ F) non-condensing
ALTITU
UDE (MAX) 2000m
2
(6562 ftt) to fully safetyy specificationss
CABLES
WARRANTY
W
One 50 ft. H ca
O
able, one 15 ft. X cable, one power
p
cable, on
ne safety groun
nd
c
cable
O year on pa
One
arts and labor
The above
a
specifications are valid at nom
minal operatting voltage and
a at a
temp
perature of 25°C
2
(77°F). Specification
ns may chan
nge without prior notice.
NOTE
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1.3
CVT-765 USER’S MANUAL
Controls and Indicators
The CVT-765 controls and indicators are shown in Figure 1. A leader line with an index number
points to each control and indicator, which is cross-referenced to a functional description in the
corresponding table. The purpose of the controls and indicators may seem obvious, but users
should familiarize themselves with them before using the CVT-765. Accidental misuse of the
controls will usually cause no serious harm. Users should also familiarize themselves with the
safety summary information found on the front page of this User’s Manual.
Figure 1. CVT-765 Controls and Indicators
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Table 2. Functional Descriptions of CVT-765 Controls and Indicators
Item
Number
Panel Markings
1
GROUND
Functional Description
Ground stud for connecting to sub-station ground
2
X
3
USB MEM
USB Flash drive interface port
4
RS-232C
RS-232C computer interface port
X voltage connector
Back-lit LCD screen (128 x 64 pixels), viewable in direct light and low
light conditions
5
6
VOLTAGE
SELECTOR
7
120/240 Vac, 4A, 50-60 Hz
Fuse: 250Vac, 5A Fast Blow
8
Voltage selection switch
Input power connector and fused power switch with third-wire safety
ground
Rugged alpha-numeric keypad
9
7500VAC
PRESENT
7500VAC hazard warning LED. This LED will be lit when a test is
being performed to remind the user that 7500VAC is present.
10
H2
H2 voltage connector
11
H1
H1 voltage connector
12
“PUSH”
TO
ARM
Spring-loaded push button switch. Press and hold to initiate a test.
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CVT-765 USER’S MANUAL
2.0
PRE-TEST SETUP
2.1
Operating Voltages
The CVT-765 can be operated from 100-120 Vac or 220-240 Vac. The proper voltage can be set
using the voltage selection switch on the front panel (see Figure 1).
2.2
LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the [Contrast ∧] key for two seconds.
Release the button when the desired contrast level has been reached.
To decrease the LCD screen contrast, press and hold the [Contrast ∨] key for two seconds.
Release the button when the desired contrast level has been reached.
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CVT-765 USER’S MANUAL
3.0
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OPERATING PROCEDURES
The CVT-765 should always be grounded with the provided ground cable before connecting H
and X cables. The transformer bushings should also be grounded before connecting test leads
to the transformer. This will prevent inducing any voltages into the CVT-765. All transformer
bus connections must be removed, and the transformer must be isolated before performing
any tests.
3.1
Connection Diagram
Figure 2. Typical CVT-765 Cable Connections
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3.2
CVT-765 USER’S MANUAL
Setting the Date and Time
To set the date and time:
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1.
2.
3.
4.
RECORD ID
SET 50/60 HZ
DISPLAY RECORD
SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [5] key (SET TIME).
c. The following screen will be displayed:
ENTER DATE
MM-DD-YY
Enter the date using the alpha-numeric keypad.
d. The following screen will be displayed:
ENTER TIME
HH:MM:SS
Enter the current time using the alpha-numeric keypad. When the complete time has
been entered, you will be immediately returned to the “START-UP” menu.
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CVT-765 USER’S MANUAL
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Setting the Interface Language
Follow the steps below to set the interface language (English, Spanish, or Turkish):
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP)
b. The following screen will be displayed:
1.
2.
3.
4.
5.
RECORD ID
SET 50/60 HZ
DISPLAY RECORD
SAVE/RESTORE RECORD
SET TIME
6. set language
Press the [6] key (SET LANGUAGE)
c. The following screen will be displayed:
1. ENGLISH
2. TURKISH
3. SPANISH
Select the preferred interface language by pressing the corresponding key on the
keypad ([1], [2], or [3]). The interface language will be set and a confirmation screen
will be displayed as shown below:
ENGLISH SET
Press any key to return to the “START-UP” menu.
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3.4
CVT-765 USER’S MANUAL
Setting the Frequency (50 or 60 Hz)
Follow the steps below to set the preferred frequency:
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2.
3.
4.
5.
6.
SET 50/60 HZ
DISPLAY RECORD
SAVE/RESTORE RECORD
SET TIME
set language
Press the [2] key (SET 50/60 HZ).
c. The following screen will be displayed:
1. 60 Hz
2. 50 hz
Select the preferred frequency by pressing the corresponding key on the keypad ([1] or
[2]). The frequency will be set and a confirmation screen will be displayed as shown
below:
60 hz set
Press any key to return to the “START-UP” menu.
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CVT-765 USER’S MANUAL
3.5
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Performing Tests
3.5.1. Entering Test Record Header Information
You can enter the test record header information before performing tests. The record header
includes identifying information such as the company, station, circuit, manufacturer, etc. Once
the header information has been set, it will apply to all subsequent test records. To enter the
header information:
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1.
2.
3.
4.
5.
6.
RECORD ID
SET 50/60 HZ
DISPLAY RECORD
SAVE/RESTORE RECORD
SET TIME
set language
Press the [1] key (RECORD ID).
c. The following screen will be displayed:
COMPANY:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the company name using the alpha-numeric keypad.
When pressing a key, the corresponding number on the key will be displayed first.
Pressing the key again will display the first letter on the key. Pressing the key again will
display the second letter on the key. For example, to type the letter “A”, you must press
the [2] key twice. To erase the character at the cursor position, press the [CLEAR] key.
Press the [Contrast ∧] key to move to the next character. Press the [Contrast ∨]
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CVT-765 USER’S MANUAL
key to move to the previous character. Press the [ENTER] key when you are done
typing the company name.
d. The following screen will be displayed:
STATION:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the station name using the alpha-numeric keypad and then press the [ENTER]
key.
e. The following screen will be displayed:
CIRCUIT:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the circuit information using the alpha-numeric keypad and then press the
[ENTER] key.
f. The following screen will be displayed:
MANUFACTURER:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the manufacturer name using the alpha-numeric keypad and then press the
[ENTER] key.
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g. The following screen will be displayed:
MODEL:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the transformer’s model information using the alpha-numeric keypad and then
press the [ENTER] key.
h. The following screen will be displayed:
SERIAL NUMBER:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the transformer’s serial number using the alpha-numeric keypad and then press
the [ENTER] key.
i.
The following screen will be displayed:
KVA RATING:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the transformer’s KVA rating using the alpha-numeric keypad and then press the
[ENTER] key.
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CVT-765 USER’S MANUAL
The following screen will be displayed:
OPERATOR:
_
↑ /↓
TO POSITION
"ENTER" TO ACCEPT
Type the operator’s name using the alpha-numeric keypad and then press the [ENTER]
key. All header information will be saved, and you will be returned to the “START-UP”
menu.
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3.5.2. Performing
P
a Transfo
ormer Test
Follow th
he steps belo
ow to test a transformerr:
a. Sttart from the “START-UP
P” menu:
1. TEST TRANSFORM
T
MER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
0
ER).
Press the [1] key (TEST TRANSFORM
T
b. The followingg screen will be displayed:
TEST
T WINDING
G:
1.X1-X3
3.Y1-Y3
5.Z1-Z3
2.X2-X
X3
4.Y2-Y
Y3
6.Z2-Z
Z3
nding by preessing the co
orrespondingg numeric keey on the keeypad.
Seelect the win
c. The followingg screen will be displayed:
NAME PLA
ATE VOLTAG
GE?
1. YES
2. NO
If yo
ou had entered name plate voltagess for a previo
ous test, thee following
scre
een will be displayed
d
insstead of the above screeen:
NOTE
NAME PLATE
E VOLTAGE
E?
1. YES
2. NO
3. USE PRE
EV DATA
Press the [3] keey if you would like to use the namee plate voltage values fro
om
the previous teest performeed. Continue
e to step c.
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CVT-765 USER’S MANUAL
1. YES
Press the [1] key (YES) if you would like to enter the transformer name plate
voltage values. The following screen will be displayed.
NAME PLATE VOLTAGE:
H : X
0 :
Type the H winding name plate voltage value using the numeric keypad. The
screen will be updated as shown below:
NAME PLATE VOLTAGE:
H : X
2,400 :
Press the [ENTER] key. The screen will be updated as shown below:
NAME PLATE VOLTAGE:
H : X
2,400 : 0
Type the X winding name plate voltage value using the numeric keypad. The
screen will be updated as shown below:
NAME PLATE VOLTAGE:
H : X
2,400 : 240
Press the [ENTER] key. Continue to step c.
2. NO
Press the [2] key (NO) if you do not want to enter the transformer name plate
voltage values. Continue to step c.
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d. The followingg screen will be displayed:
PRESS AND HOLD ARM
SWITCH TO TES
ST
OR
"STOP
P" TO ABO
ORT
Press and holld the [ARM
M] switch to initiate the test.
e. The followingg screen will be displayed while the test is beingg performed:
test in progres
ss
please
e wait...
Continue to hold
h
down th
he [ARM] sw
witch. Testin
ng will continue, and thee test resultss will
be displayed on the LCD screen
s
when
n testing hass finished:
RATIO
O
+10.004
PHASE = 0.02°
%
%DIFF
0.04
You can now release the [ARM] swittch.
T polarity is displayed as either a plus
The
p sign (+) for “in-phasse” or a minus sign (-) fo
or
“o
out-of-phase
e”. The valuee listed undeer “% DIFF” is the percentage error.
The
e percentagee error (% DIFF) is calcullated as the absolute value of:
[(Calculated Raatio – Measu
ured Ratio) / Calculated Ratio)] x 100
0
NOTE
Press any keyy to continuee.
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CVT-765
USER’S MANUA
AL
f. The followingg screen will be displayed:
KEEP THIS READING
G?
1. YES
2. NO
Press the [1] key (YES) to
o save the reeading.
g. The followingg screen will be displayed:
TEST SAVED
Press any keyy to continuee.
NOTE
The
e above screeen will be displayed if there is curreently no dataa in the unit’s
me
emory bufferr. If a test waas previouslyy performed
d or a test reecord was
resstored from Flash EEPRO
OM or from a Flash drivee, the following screen will
w
be displayed in
nstead:
PREVIOUS
P
DATA IN BUF
B
1.
1
APPEND PREV. DA
ATA
2.
2
CLEAR PREV. DAT
TA
Pre
ess the [1] key (APPEND
D PREV. DATA
A) to append
d the data in
n the unit’s
wo
orking memo
ory to the current test reesults, or preess the [2] key
k (CLEAR PREV.
P
DATA) to clear any previou
us data from the unit’s memory
m
bufffer and only save
the
e current tesst results.
The
e following screen
s
will th
hen be displayed:
TEST
T SAVED
Pre
ess any key to
t continue.
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h. The followingg screen will be displayed:
RUN ANOT
THER TEST?
?
1. YES
2. NO
3. REPEA
AT PREV. TEST
T
Press the [2] key (NO).
i.
The followingg screen will be displayed:
SAVE THIS RECORD?
?
1. YES
2. NO
Press the [1] key (YES) to
o save the teest record to
o the unit’s Flash
F
EEPROM
M.
j.
The followingg screen will be displayed momentarily:
SAVING RECORD...
R
PLEASE WAIT...
W
The followingg confirmatio
on screen will then be displayed:
RECORD NUMBER 1
HAS BEE
EN SAVED!
The
e unit will au
utomatically assign the record
r
numb
ber and will not over-wrrite
existing test records.
NOTE
Press any keyy to return to
o the “STARTT-UP” menu
u.
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3.6
CVT-765 USER’S MANUAL
Working With Test Records
3.6.1. Viewing the Contents of the Working Memory
Whenever a test is performed or a test record is retrieved, the data is stored in the CVT-765’s
working memory. You can view the test data using the steps below:
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3.
4.
5.
6.
DISPLAY RECORD
SAVE/RESTORE RECORD
SET TIME
set language
Press the [3] key (DISPLAY RECORD).
c. The basic test record information will be displayed as shown:
SINGLE PHASE
Num Tests: 1
04/15/11
09:52:50
d. Press the [Contrast ∨] key. The test record details will be displayed as shown below:
1 SINGLE PHASE
7440 volts
RATIO
%DIFF
10.004
0.04
Press the [STOP] key to return to the “START-UP” menu.
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3.6.2. Saving Test Results to a Test Record
After performing a test, the user is presented the option to save the test results to the unit’s
Flash EEPROM or to a USB Flash Drive. If the test results are not saved immediately after
performing a test, they will still remain in the working memory and can be saved later, as long
as a new test has not been performed and the unit has not been turned off. Follow the steps
below to save the test results from the working memory to a test record (the following
procedure can also be used to re-save a restored test record to a new memory location or to a
USB Flash Drive):
a. Perform a test or restore a test record to the working memory (see section 3.6.3 and
3.6.4), and then start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3. DISPLAY RECORD
4. SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [4] key (SAVE/RESTORE RECORD).
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CVT-765
USER’S MANUA
AL
c. The followingg screen will be displayed:
1. RESTOR
RE RECORD
D
2.
3.
4.
5.
SAVE RECORD
R
RECORD
D DIRECTO
ORY
ERASE RECORD
COPY to
t
THUMB DRIVE
Option 5 (COPYY TO THUMB
B DRIVE) willl be listed on
nly if a USB Flash
F
drive iss
con
nnected to the CVT-765..
NOTE
Press the [2] key (SAVE RECORD).
R
Iff a USB Flash
h drive is con
nnected to the
t unit, con
ntinue to ste
ep d.
Iff a USB Flash
h drive is NO
OT connecte
ed to the uniit, continue to step e.
d. The followingg screen will be displayed:
1. SAVE INTERNALL
I
LY
2. SAVE TO
T
THUMB DRIVE
1. SAVE INTERNALLYY
Press the [1] key (SAVE INTER
RNALLY) to save
s
the testt record to the unit’s Flaash
EEPRO
OM. Continu
ue to step e..
2. SAVE TO THUMB DRIVE
Press the [2] key (SAVE TO TH
HUMB DRIVEE) to save th
he test recorrd to the
conne
ected USB Flash drive. Th
he followingg screen will be displayed
d:
REC
C_001 SAVE
ED TO
THU
UMB DRIVE.
Press any key to return
r
to thee “START-UP
P” menu.
22
CVT-765 USER’S MANUAL
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e. The following screen will be displayed:
RECORD NUMBER 5
HAS BEEN SAVED!
Press any key to return to the “START-UP” menu.
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CVT-765
USER’S MANUA
AL
3.6.3. Restoring
R
a Test Reco
ord From Flash
F
EEPR
ROM
Use the steps
s
below to restore a test record from the CV
VT-765’s Flassh EEPROM to the workking
memory::
a. Sttart from the “START-UP
P” menu:
1. TEST TRANSFORM
T
MER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
0
Press the [2] key (SETUP).
b. The followingg screen will be displayed:
1. RECORD
D ID
2. SET 50
0/60 HZ
3. DISPLA
AY RECORD
D
4. SAVE/R
RESTORE RECORD
R
5. SET TI
IME
6. set la
anguage
Press the [4] key (SAVE/R
RESTORE REECORD).
c. The followingg screen will be displayed:
1.
2.
3.
4.
5.
RESTOR
RE RECORD
D
SAVE RECORD
R
RECORD
D DIRECTO
ORY
ERASE RECORD
COPY to
t
THUMB DRIVE
Option 5 (COPYY TO THUMB
B DRIVE) willl be listed on
nly if a USB Flash
F
drive iss
con
nnected to the CVT-765..
NOTE
Press the [1] key (RESTORE RECORD)).
24
CVT-765 USER’S MANUAL
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R 1
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d. The followingg screen will be displayed:
RESTORE RECOR
RD
1.ENTER RECORD NU
UMBER
2.SCROLL
L TO SELEC
CT
If you
y have a USB
U Flash drivve inserted in the CVT-7
765’s “USB MEM”
M
port, the
t
folllowing screeen will be dissplayed insteead of the above screen
n:
NOTE
1.INTERNAL
1
L STORAGE
E
2.THUMB
2
DRIVE
Pre
ess the [1] key (INTERNA
AL STORAGEE).
The
e following screen
s
will be
b displayed::
RESTOR
RE RECORD
D
1.ENTER
1
RE
ECORD NUM
MBER
2.SCROLL
2
TO SELECT
T
Con
ntinue with the steps beelow.
1. ENTER
R RECORD NUMBER
N
Press the [1] key (ENTER REC
CORD NUMBER) if you kn
now the reco
ord number that
you would
w
like to restore.
1.1.
w be displayyed:
The following screen will
RESTO
ORE RECOR
RD
NUM
MBER:
a then preess
Type the reecord numbeer using the alpha-numeeric keypad and
the [ENTE
ER] key.
25
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CVT-765 USER’S MANUAL
1.2.
The following screen will be displayed:
RECORD RESTORED!
DISPLAY RECORD?
1.YES
2.NO
Press the [1] key (YES) to display the test record.
1.3.
The basic information about the restored test record will be displayed as
shown:
SINGLE PHASE
Num Tests: 1
04/15/11
09:52:50
Press the [Contrast ∨] key. The test record details will be displayed as
shown:
1 SINGLE PHASE
7440 volts
RATIO
%DIFF
10.004
0.04
Press the [STOP] key to return to the “START-UP” menu. The restored
test record will remain loaded in the working memory.
2. SCROLL TO SELECT
Press the [2] key (SCROLL TO SELECT) to scroll through a directory of the stored
test records.
2.1.
The following screen will be displayed:
RECORDS DIRECTORY
"UP" TO SCROLL FWD
"DWN" TO SCROLL RVS
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CVT-765 USER’S MANUAL
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Press the [Contrast ∧] button or the [Contrast ∨] key to display the
next or previous test record, respectively.
The basic test record information will be displayed as shown:
#1
04/15/11 09:52
SINGLE PHASE
1 TESTS
When you have located the test record that you would like to restored,
press the [ENTER] key. Continue to step 1.2 on page 26.
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CVT-765 USER’S MANUAL
3.6.4. Restoring a Test Record From a USB Flash Drive
Use the steps below to restore a test record from a USB Flash drive to the CVT-765’s working
memory:
a. Make sure the USB Flash drive containing the test record(s) is inserted in the CVT-765’s
USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3. DISPLAY RECORD
4. SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [4] key (SAVE/RESTORE RECORD).
c. The following screen will be displayed:
1.
2.
3.
4.
5.
RESTORE RECORD
SAVE RECORD
RECORD DIRECTORY
ERASE RECORD
COPY TO THUMB DRIVE
Press the [1] key (RESTORE RECORD).
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CVT-765 USER’S MANUAL
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d. The following screen will be displayed:
1.INTERNAL STORAGE
2.THUMB DRIVE
Press the [2] key (THUMB DRIVE).
e. The following screen will be displayed:
RESTORE THUMB DRIVE
REC_
Type the record number that you would like to restore using the alpha-numeric keypad
and then press the [ENTER] key.
f. The test record will be restored to the unit’s working memory and the following screen
will be displayed:
REC_000 restored!
DISPLAY RECORD?
1.YES
2.NO
Press the [1] key (YES) to display the restored test record.
g. The basic information about the restored test record will be displayed as shown below:
SINGLE PHASE
Num Tests: 1
04/15/11
09:52:50
29
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CVT-765 USER’S MANUAL
Press the [Contrast ∨] key. The test record details will be displayed as shown below:
1 SINGLE PHASE
7440 volts
RATIO
%DIFF
10.004
0.04
Press the [STOP] key to return to the “START-UP” menu. The restored test record will
remain loaded in the working memory.
30
CVT-765 USER’S MANUAL
REV 1
3.6.5. Copying Test Records to a USB Flash Drive
Use the steps below to copy one or all test records from the unit’s Flash EEPROM to a
connected USB Flash drive:
a. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start
from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3. DISPLAY RECORD
4. SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [4] key (SAVE/RESTORE RECORD).
c. The following screen will be displayed:
1.
2.
3.
4.
RESTORE RECORD
SAVE RECORD
RECORD DIRECTORY
ERASE RECORD
5. COPY TO THUMB DRIVE
Press the [5] key (COPY TO THUMB DRIVE).
31
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CVT-765 USER’S MANUAL
d. The following screen will be displayed:
COPY REC TO THUMB DRV
1.COPY SINGLE RECORD
2.COPY ALL RECORDS
1. COPY SINGLE RECORD
Press the [1] key (COPY SINGLE RECORD) to copy a single test record from the
CVT-765’s Flash EEPROM to the connected USB Flash drive. The following screen
will be displayed:
ENTER RECORD NUMBER
TO COPY TO FLASH DRV
NUMBER:
Type the record number using the alpha-numeric keypad and then press the
[ENTER] key. The test record will be copied to the USB Flash drive and the
following screen will be displayed:
REC_000 SAVED TO
THUMB DRIVE
Press any key to return to the “START-UP” menu.
2. COPY ALL RECORDS
Press the [2] key (COPY ALL RECORDS) to copy all test records from the CVT765’s Flash EEPROM to the connected USB Flash drive. All test records will be
copied from the unit to the connected USB Flash drive. The following screen will
be displayed when the process is finished:
32
CVT-765 USER’S MANUAL
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ALL RECORDS HAVE BEEN
TRANSFERRED TO THUMB
DRIVE!
Press any key to return to the “START-UP” menu.
33
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CVT-765
USER’S MANUA
AL
3.6.6. Viewing
V
the
e Test Reco
ord Directo
ory
Use the steps
s
below to browse through a dirrectory of th
he test recorrds stored in the CVT-765’s
Flash EEP
PROM memo
ory:
a. Sttart from the “START-UP
P” menu:
1. TEST TRANSFORM
T
MER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
0
Press the [2] key (SETUP)
b. The followingg screen will be displayed:
1. RECORD
D ID
2. SET 50
0/60 HZ
3. DISPLA
AY RECORD
D
4. SAVE/R
RESTORE RECORD
R
5. SET TI
IME
6. set la
anguage
Press the [4] key (SAVE/R
RESTORE REECORD).
c. The followingg screen will be displayed:
1. RESTOR
RE RECORD
D
2. SAVE RECORD
R
3. RECORD
D DIRECTO
ORY
4. ERASE RECORD
5. COPY TO
T
THUMB DRIVE
Option 5 (COPYY TO THUMB
B DRIVE) is listed only if a USB Flash drive is
con
nnected to the unit.
NOTE
Press the [3] key (RECOR
RD DIRECTOR
RY)
34
CVT-765 USER’S MANUAL
REV 1
d. The following screen will be displayed:
RECORDS DIRECTORY
"UP" TO SCROLL FWD
"DWN" TO SCROLL RVS
Press the [Contrast ∧] or [Contrast ∨] key to scroll through the test record
directory. The test record header will be displayed as shown:
SINGLE PHASE
Num Tests: 1
04/15/11
09:52:50
You can continue to scroll through the record directory by pressing the [Contrast ∧]
and [Contrast ∨] keys. Press the [STOP] key to return to the “START-UP” menu.
35
REV 1
3.6.7.
CVT-765 USER’S MANUAL
Erasing Test Records from the Flash EEPROM
Follow the steps below to erase test records from the Flash EEPROM:
a. Start from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3. DISPLAY RECORD
4. SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [4] key (SAVE/RESTORE RECORD).
c. The following screen will be displayed:
1. RESTORE RECORD
2. SAVE RECORD
3. RECORD DIRECTORY
4. ERASE RECORD
5. COPY TO THUMB DRIVE
Press the [4] key (ERASE RECORD).
36
CVT-765 USER’S MANUAL
M
R 1
REV
d. The followingg screen will be displayed:
ERASE RECORD
D
EC.
1.ERASE SINGLE RE
2.ERASE ALL RECOR
RDS
"STOP" TO EXI
IT
If you
y have a USB
U Flash drivve inserted in the CVT-7
765’s “USB MEM”
M
port, the
t
folllowing screeen will be dissplayed insteead of the above screen
n:
NOTE
1.ERASE
1
IN
NTERNAL REC
R
2.ERASE
2
THUMB DRV REC
Pre
ess the [1] key (ERASE IN
NTERNAL REEC).
The
e following screen
s
will be
b displayed::
ERASE
E RECORD
1.ERASE
1
SINGLE REC
C.
2.ERASE
2
ALL RECORD
DS
T
"STOP" TO EXIT
Con
ntinue with the steps beelow.
1. ERASE SIN
NGLE REC.
Press the [1] key (ERA
ASE SINGLE REC.) to erase a single teest record frrom the unitt’s
internal Flash
F
EEPROM
M. The follow
wing screen will be disp
played:
ERA
ASE RECOR
RD
NUM
MBER:
You
Y can canccel the proceess and retu
urn to the “START-UP” menu
m
by presssing
the
t [STOP]] key.
NOTE
37
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CVT-765 USER’S MANUAL
Type the record number that you would like to erase using the alpha-numeric
keypad and then press the [ENTER] key. If you do not know the test record
number, you can first view the test record directory using the instructions in section
3.6.6.
The following screen will be displayed while the record is being erased:
ERASing record
PLEASE WAIT...
The following screen will be displayed when the test record has been completely
erased:
RECORD NUMBER 8
ERASED!
Press any key to continue. You will be returned to the beginning of step d.
2. ERASE ALL RECORDS
Press the [2] key (ERASE ALL RECORDS) to erase all the test records from the unit’s
internal Flash EEPROM. The following warning screen will be displayed:
ERASE ALL RECORDS!
ARE YOU SURE?
"ENTER" To CONTINUE.
You can press the [STOP] key to cancel the process and return to the “START-UP”
menu.
Press the [ENTER] key to proceed with deleting all the test records from the unit’s
Flash EEPROM. The following screen will be displayed during the erasure process:
38
CVT-765 USER’S MANUAL
REV 1
ERASing recordS
PLEASE WAIT...
The following screen will be displayed when all test records have been completely
erased:
RECORDS ERASED!
Press any key to return to the “START-UP” menu.
39
REV 1
3.6.8.
CVT-765 USER’S MANUAL
Erasing Test Records from a USB Flash Drive
Follow the steps below to erase test records from a USB Flash drive:
a. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start
from the “START-UP” menu:
1. TEST TRANSFORMER
2. SETUP
TIME:
DATE:
15:16:17
05/17/11
Press the [2] key (SETUP).
b. The following screen will be displayed:
1. RECORD ID
2. SET 50/60 HZ
3. DISPLAY RECORD
4. SAVE/RESTORE RECORD
5. SET TIME
6. set language
Press the [4] key (SAVE/RESTORE RECORD).
c. The following screen will be displayed:
1. RESTORE RECORD
2. SAVE RECORD
3. RECORD DIRECTORY
4. ERASE RECORD
5. COPY TO THUMB DRIVE
Press the [4] key (ERASE RECORD).
40
CVT-765 USER’S MANUAL
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d. The following screen will be displayed:
1.ERASE INTERNAL REC
2.ERASE THUMB DRV REC
Press the [2] key (ERASE THUMB DRV REC).
e. The following screen will be displayed:
ERASE RECORD
1.ERASE SINGLE REC.
2.ERASE ALL RECORDS
"STOP" TO EXIT
1. ERASE SINGLE REC.
Press the [1] key (ERASE SINGLE REC.) to erase a single test record from the
connected USB Flash drive. The following screen will be displayed:
ERASE THUMB DRIVE
REC_
Type the record number that you would like to erase using the alpha-numeric
keypad and then press the [ENTER] key. The test record will be erased from the
USB Flash drive and the following screen will be displayed:
THUMB DRIVE RE000
ERASED!
Press any key to continue. You will be returned to the beginning of step e. Press the
[STOP] key to return to the “START-UP” menu.
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CVT-765 USER’S MANUAL
2. ERASE ALL RECORDS
Press the [2] key (ERASE ALL RECORDS) to delete all test records from the connected
USB Flash drive. The following warning screen will be displayed:
ERASE ALL THUMB DRIVE
RECORDS!
ARE YOU SURE?
"ENTER" TO CONTINUE.
Press the [STOP] key if you do not want to erase all the test records. You will be
returned to the “START-UP” menu.
Press the [ENTER] key to proceed with deleting all the test records from the
connected USB Flash drive. The following screen will be displayed when all the
records have been erased:
all thumb drive
records erased!
Press any key to return to the “START-UP” menu.
42
1520 S. Hellman Ave • Ontario, CA 91761 • USA
Phone: 909-923-9390 • Fax: 909-923-9391
www.vanguard-instruments.com
Copyright © 2015 by Vanguard Instruments Company, Inc.
CVT-765 User’s Manual • Revision 1.2 • October 22, 2015 • TA